Eating behaviours related to psychological stress are associated with functional hypothalamic amenorrhoea in exercising women.

abstract：:The use of large cross-sectional norms on Brazilian children and youths aged 7 to 18 years within a six level competition plan helps to assess development status and monitor change. Non-athletic prototypes for comparative purposes are illustrated by the use of the lowest competitive level of 18 year olds to assess dif...

journal_title：Journal of sports sciences

authors： Matsudo VK,Rivet RE,Pereira MH

更新日期：1987-04-01 00:00:00

abstract：:This study investigated the influence of the regression model and initial intensity during an incremental test on the relationship between the lactate threshold estimated by the maximal-deviation method and performance in elite-standard runners. Twenty-three well-trained runners completed a discontinuous incremental r...

journal_title：Journal of sports sciences

authors： Santos-Concejero J,Tucker R,Granados C,Irazusta J,Bidaurrazaga-Letona I,Zabala-Lili J,Gil SM

更新日期：2014-01-01 00:00:00

abstract：:The aims of this study were to provide a profile of young water polo players and to compare technical and tactical aspects, movement patterns, and cardiac loads of youth water polo and Acquagoal codes. Ten young (age 12.3 years, s = 0.6) male water polo players underwent anthropometric (stature, body mass, body mass i...

journal_title：Journal of sports sciences

authors： Lupo C,Tessitore A,Cortis C,Ammendolia A,Figura F,Capranica L

更新日期：2009-06-01 00:00:00

abstract：:The aim of present study was to examine the relationships between serum and salivary values of free testosterone, dehydroepiandrosterone, and cortisol before and after a session of resistance exercise. Twenty-eight healthy men (mean age 40 years, s = 4) participated in the present study. Serum and salivary samples wer...

journal_title：Journal of sports sciences

authors： Cadore E,Lhullier F,Brentano M,Silva E,Ambrosini M,Spinelli R,Silva R,Kruel L

更新日期：2008-08-01 00:00:00

abstract：:We aimed to compare differentiated training loads (TL) between fitness responders and non-responders to an eight-week pre-season training period in a squad of thirty-five professional rugby union players. Differential TL were calculated by multiplying player's perceptions of breathlessness (sRPE-B) and leg muscle exer...

journal_title：Journal of sports sciences

authors： McLaren SJ,Smith A,Bartlett JD,Spears IR,Weston M

更新日期：2018-11-01 00:00:00

abstract：:The purpose of the study was to examine the health effects of 8 weeks of recreational badminton in untrained women. Participants were matched for maximal oxygen uptake (V̇O2max) and body fat percentage and assigned to either a badminton (n = 14), running (n = 14) or control group (n = 8). Assessments were conducted pr...

journal_title：Journal of sports sciences

authors： Patterson S,Pattison J,Legg H,Gibson AM,Brown N

更新日期：2017-06-01 00:00:00

abstract：:The main purpose of this study was to compare the effects of resistance training (RT) performed with different training volumes on phase angle (PhA), body water components, and muscle quality (MQ) in untrained older adult women. A second purpose was to assess the relationship between PhA and MQ. Sixty-two older adult ...

journal_title：Journal of sports sciences

authors： Cunha PM,Tomeleri CM,Nascimento MAD,Nunes JP,Antunes M,Nabuco HCG,Quadros Y,Cavalcante EF,Mayhew JL,Sardinha LB,Cyrino ES

更新日期：2018-12-01 00:00:00

abstract：:An important goal of the athlete's everyday diet is to provide the muscle with substrates to fuel the training programme that will achieve optimal adaptation for performance enhancements. In reviewing the scientific literature on post-exercise glycogen storage since 1991, the following guidelines for the training diet...

journal_title：Journal of sports sciences

authors： Burke LM,Kiens B,Ivy JL

更新日期：2004-01-01 00:00:00

abstract：:In order to investigate further the use of standardization procedures to determine training effects on cardiac dimension and function, two groups of subjects were analysed noninvasively. A control group of sedentary men (n = 7) and an experimental group of weight lifters (n = 12) volunteered for a standard M-mode echo...

journal_title：Journal of sports sciences

authors： Brown SP,Thompson WR

更新日期：1987-07-01 00:00:00

abstract：:Muscle strength is thought to be a major factor in athletic success. However, the relationship between muscle strength and sprint performance has received little attention. The aim of this study was to examine the relationship in elite performers of isokinetic muscle strength across three lower limb joints and sprinti...

journal_title：Journal of sports sciences

authors： Dowson MN,Nevill ME,Lakomy HK,Nevill AM,Hazeldine RJ

更新日期：1998-04-01 00:00:00

abstract：:The relationships between team performance indicators and match outcome have been examined in many team sports, however are limited in Australian Rules football. Using data from the 2013 and 2014 Australian Football League (AFL) regular seasons, this study assessed the ability of commonly reported discrete team perfor...

journal_title：Journal of sports sciences

authors： Robertson S,Back N,Bartlett JD

更新日期：2016-01-01 00:00:00

abstract：:Relationships between skeletal maturation and fundamental motor skills and gross motor coordination were evaluated in 429 children (213 boys and 216 girls) 7-10 years. Skeletal age was assessed (Tanner-Whitehouse 2 method), and stature, body mass, motor coordination (Körperkoordinations Test für Kinder, KTK) and funda...

journal_title：Journal of sports sciences

authors： Freitas DL,Lausen B,Maia JA,Lefevre J,Gouveia ÉR,Thomis M,Antunes AM,Claessens AL,Beunen G,Malina RM

更新日期：2015-01-01 00:00:00

abstract：:The inflammatory responsive cytokine interleukin-6 (IL-6) helps regulate immune responses to exercise. Evidence suggests that increases in IL-6 are related to exercise duration and intensity. However, the moderating effect of sex and underlying mediators have received limited attention. We compared plasma IL-6 respons...

journal_title：Journal of sports sciences

authors： Edwards KM,Burns VE,Ring C,Carroll D

更新日期：2006-08-01 00:00:00

abstract：:The purposes of this study were to examine the effects of varying levels of goals on increasing daily steps and the frequency of goal achievement among middle-aged adults. Ninety-six adults participated in a randomised control study. Participants were randomly assigned to five different step goal groups: (1) Easy (n =...

journal_title：Journal of sports sciences

authors： Moon DH,Yun J,McNamee J

更新日期：2016-10-01 00:00:00

abstract：:This study aimed to assess the effects of post-activation potentiation in the strength related variables of a kick start. Thirteen competitive swimmers performed three kick starts after a standardized warm up (denoted USUAL) and another after inducing post-activation through five isotonic repetitions on an eccentric f...

journal_title：Journal of sports sciences

authors： Cuenca-Fernández F,López-Contreras G,Mourão L,de Jesus K,de Jesus K,Zacca R,Vilas-Boas JP,Fernandes RJ,Arellano R

更新日期：2019-02-01 00:00:00

abstract：:The feasibility requirements of administering field-based cognitive assessments are rarely reported. We examined the feasibility of administering a group-based cognitive test battery in a school setting with older adolescents. Several types of reliability were also assessed in the control group. Preliminary efficacy a...

journal_title：Journal of sports sciences

authors： Leahy AA,Michels MFI,Eather N,Hillman CH,Shigeta TT,Lubans DR,Smith JJ

更新日期：2020-08-01 00:00:00

abstract：:We hypothesised that habitual physical activity (PA) together with progressive endurance training contributes to the differences in training response (Δ[V(·)]O(2max)) in healthy and physically active male participants. Twenty volunteers (age 30±3 years and [V(·)]O(2max) 54±7 ml·kg⁻¹·min⁻¹) participated in an eight-wee...

journal_title：Journal of sports sciences

authors： Hautala A,Martinmaki K,Kiviniemi A,Kinnunen H,Virtanen P,Jaatinen J,Tulppo M

更新日期：2012-01-01 00:00:00

abstract：:The quadruple approach in the title refers to four different studies over a period of 3 years. The common factor in these studies is the methodology of the (Brussels) Electromyographic Signal Processing and Analysis System (ESPAS), a hardware and software EMG data acquisition system that has constantly been improved. ...

journal_title：Journal of sports sciences

authors： Clarys JP,Cabri J,Bollens E,Sleeckx R,Taeymans J,Vermeiren M,Van Reeth G,Voss G

更新日期：1990-01-01 00:00:00

abstract：:Abstract This study constructed a technique effectiveness evaluation formula for table tennis players based on the relationship between the scoring rate and usage rate of techniques and established evaluation criteria through the examination of 224 matches of the world's top 35 players. It also built a competition per...

journal_title：Journal of sports sciences

authors： Zhang H,Liu W,Hu JJ,Liu RZ

更新日期：2014-01-01 00:00:00

abstract：:A maximal multistage 20 m shuttle run test was designed to determine the maximal aerobic power of schoolchildren, healthy adults attending fitness class and athletes performing in sports with frequent stops and starts (e.g. basketball, fencing and so on). Subjects run back and forth on a 20 m course and must touch the...

journal_title：Journal of sports sciences

authors： Léger LA,Mercier D,Gadoury C,Lambert J

更新日期：1988-07-01 00:00:00

abstract：:The present study investigated birthdate (known as the Relative Age Effect; RAE) and birthplace as determinants of expertise in an international sample of elite ice hockey players. The sample included 566 World Junior (WJR) ice hockey players from four countries (Canada, n = 153; USA, n = 136; Sweden, n = 140; Finland...

journal_title：Journal of sports sciences

authors： Bruner MW,Macdonald DJ,Pickett W,Côté J

更新日期：2011-09-01 00:00:00

abstract：:The kinematics of male wheelchair rugby players (n = 8) during the final match of the 2008 Demolition Derby were assessed using two cameras (10 Hz) and a tracking method based on image-processing techniques. The players' on-court trajectory, total and accumulated distances covered, distances covered during working and...

journal_title：Journal of sports sciences

authors： Sarro KJ,Misuta MS,Burkett B,Malone LA,Barros RM

更新日期：2010-01-01 00:00:00

abstract：:The aim of this study was to examine acute physiological responses and time-motion characteristics associated with three different small-sided soccer game formats in youth players. Sixteen male soccer players aged 16.3+/-0.6 years (mean+/-s) completed three variations of a small-sided game (i.e. 2 vs. 2, 4 vs. 4, and ...

journal_title：Journal of sports sciences

authors： Hill-Haas SV,Dawson BT,Coutts AJ,Rowsell GJ

更新日期：2009-01-01 00:00:00

abstract：:The use of dietary supplements is widespread in sport and most athletes competing at the highest level of competition use some form of dietary supplementation. Many of these supplements confer no performance or health benefit, and some may actually be detrimental to both performance and health when taken in high doses...

journal_title：Journal of sports sciences

authors： Maughan RJ

更新日期：2005-09-01 00:00:00

abstract：UNLABELLED:The drop jump is a popular form of plyometric exercise often undertaken to enhance countermovement jump ability (jump height). Despite its popularity the effects of drop jump training on countermovement jump height are often inconsistent. Such inconsistencies may be as a result of differences in the drop jum...

journal_title：Journal of sports sciences

authors： Marshall BM,Moran KA

更新日期：2013-01-01 00:00:00

abstract：:This study investigated the effects of knee localised muscle damage on running kinematics at varying speeds. Nineteen young women (23.2 ± 2.8 years; 164 ± 8 cm; 53.6 ± 5.4 kg), performed a maximal eccentric muscle damage protocol (5 × 15) of the knee extensors and flexors of both legs at 60 rad · s(-1). Lower body kin...

journal_title：Journal of sports sciences

authors： Tsatalas T,Giakas G,Spyropoulos G,Sideris V,Lazaridis S,Kotzamanidis C,Koutedakis Y

更新日期：2013-01-01 00:00:00

abstract：:In this study, we examined (1) the relationship between self-talk and affect and (2) the nature of motivating self-talk. Ninety high-school athletes completed the Affect Grid and the Self-Talk Grid before practice and competition. Significant positive second-order partial correlations of low to moderate strength offer...

journal_title：Journal of sports sciences

authors： Hardy J,Hall CR,Alexander MR

更新日期：2001-07-01 00:00:00

abstract：:The causes of fatigue during muscular exercise include factors that reside in the brain (central mechanisms) as well as the muscles themselves (peripheral mechanisms). Central fatigue is largely unexplored, but there is increasing evidence that increased brain serotonin (5-HT) can lead to central (mental) fatigue, the...

journal_title：Journal of sports sciences

authors： Davis JM

更新日期：1995-07-01 00:00:00

abstract：:This study aimed to investigate why futsal players decide to dribble. For this purpose, we analysed 396 trials comprising the dribbles (n = 132), passes (n = 131) or shots (n = 133), performed by 70 male futsal players. Passing and shooting angles, and interpersonal distance, including their rates of change (velocity ...

journal_title：Journal of sports sciences

authors： Corrêa UC,de Pinho ST,da Silva SL,Clavijo FA,Souza TO,Tani G

更新日期：2016-12-01 00:00:00

abstract：:The aim of this study was to compare equivalence and agreement of physical activity output data collected by a Research Tri-axial accelerometer (R3T) during walking and running on a treadmill versus on land. Fifty healthy volunteers, 35 males (age 21.9 +/- 1.8 years) and 15 females (age 21.6 +/- 0.7 years), underwent ...

journal_title：Journal of sports sciences

authors： Vanhelst J,Zunquin G,Theunynck D,Mikulovic J,Bui-Xuan G,Beghin L

更新日期：2009-05-01 00:00:00